Home / 142,108.92-196,116.66-81,699.12

Finding the Fourth Proportional to 142,108.92, 196,116.66 and 81,699.12

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Solution

The fourth proportional to 142,108.92, 196,116.66 and 81,699.12 is: 112,748.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,108.92 : 196,116.66 = 81,699.12 : x
  2. Step 2: Convert to fraction form
    142,108.92/196,116.66 = 81,699.12/x
  3. Step 3: Cross multiply
    142,108.92x = 196,116.66 × 81,699.12
  4. Step 4: Simplify right side
    142,108.92x = 16,022,558,539.34
  5. Step 5: Solve for x
    x = 16,022,558,539.34/142,108.92
  6. Step 6: Final answer
    x = 112,748.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.